How can there be a black side of the porcelain tooth 50

Normal does not have an effect on the human body, you belong to the three-quarters crown.

Indications] 1 Defects on the adjacent surface of the anterior teeth or incisors with tight occlusion, large occlusion, deep overbite (occlusion), and small ultra occlusion, and those who cannot or are not suitable for restoration such as porcelain crowns or light-curing veneers.

2. The retainer of the anterior tooth fixation bridge, the abutment tooth is a pulp tooth or other retainer is not suitable for it.

3 Those who need to have a fixed splint or occlusal reconstruction.

4. In the case that the patient is unwilling to grind the tooth tissue more and wants to retain the natural color of the lip and buccal teeth, it can be considered as a fixed restoration retainer.

Hello: This is normal, and it has no effect on the human body. It's just that cobalt-chrome porcelain teeth will cause black lines on the neck edge for a long time, which will affect the appearance. Cosmetic restorations of anterior teeth should be done with all-ceramic crowns.

In previous years, nickel-chromium porcelain crowns were said to have cases of allergies and chronic kidney disease, but now most hospitals no longer do them. In fact, in the world, gold porcelain crowns or all-ceramic crowns are used for restoration crowns, because their physical properties are more stable; The aesthetic effect is better.

Because the inside of the porcelain tooth is metal, it is inevitable that the gums will turn jet black. After changing the all-porcelain tooth, because the material is only porcelain, it will not affect the surface color of the gums, but the all-porcelain ** is generally more expensive and less cost-effective. Although the color of the gums will change after wearing porcelain teeth for a long time, as long as you do not observe them closely, even if the color is wrong, it is very natural and will not give you a prominent feeling.

Metal neck rings are normal.

The effect is to resist deformation when casting the inner crown!

Normal, unspoken rules, all like this. For porcelain trimming, if you want to wrap the porcelain, you have to explain it in advance.

Metal edge, porcelain trim for the edge. It's all like that, it's normal. You can't be wrong, I'm a national-level cavity technician.

Experts said that the main reason for the occurrence of black lines in porcelain teeth is that doctors and technicians are not in place, and the edges of porcelain teeth are not suitable and there are gaps. In addition, if the porcelain tooth is made of base metal, due to its unstable metal chemical properties, the gums in contact with the porcelain tooth will be blackened, which will affect the appearance.

In addition, because the metal layer is opaque, when the light is refracted inside the porcelain tooth, it cannot reach the neck of the porcelain tooth well, so that the part of the contact between the porcelain tooth and the gum is darker than other parts. Therefore, if the production is not standardized, there may be depressed black lines, gray lines, and black gums.

In order to avoid the occurrence of black lines in porcelain teeth, the material is selected as porcelain teeth or all-ceramic teeth, and doctors and technicians with high technical skills should be selected.

It can be seen that the key to preventing black lines on the edges of porcelain teeth is to find a skilled doctor.

The reason why the edge of the porcelain tooth is blackened is mainly because the seal between the edge of the porcelain tooth and the abutment tooth is not good, which causes the inlay of food in the usual use and the development of time. This situation is mainly due to the doctor's operation level or the technician's low production level, which leads to the position and shape of the edge of the porcelain tooth can not be well matched with the abutment tooth, thus leaving a gap between the abutment tooth and the porcelain tooth.

Experts point out that if the edge of the porcelain tooth turns black, it often only means that the porcelain tooth restoration has failed. If you want to solve this situation, you can only remove the porcelain tooth and re-repair it. At this time, the patient can choose the cosmetic crown technology, which can quickly repair the failed porcelain tooth, the whole process is very short, and the whole process does not appear too painful.

The black edge of the porcelain tooth must be dealt with in time, because this indicates the failure of the porcelain tooth, and the failure of the porcelain tooth is not only black, but also the possibility of gum swelling, congestion and other adverse reactions. If you want to avoid this situation, then you need to choose a regular hospital when doing porcelain teeth, because the doctors and technicians in regular hospitals are strictly trained, so they can give greater protection in porcelain tooth restoration.